Feeder for slurry, wood-pulp, &amp;c.



R. W. E. LEACH.

FEEDER FOR SLURRY, WO0D PULP, (1w.

APPLIOATION FILED DBO. 21, 1909.

9999321 Patented Aug. 1, 1911.

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attenua tra RALPH W. E. LEACH,

OF CASTALIA, OHIQ.

FEEDER FOR SLURRY, WOOD-PULP, &C.

Specification of Letters Patent.

Patented Aug. i, 1911.

Application led December 21, 1909. Serial No. 534,337.

for insuring the periodic supply, in predetcrmined quantities, of dense fluids, such as slurry or wood pulp in feeding kilns or digesters.

A further object is to insure the positive seating and unseating of the feed controller and the retention of the same in its opened position for such time as' may be necessary to allow the desired discharge. And a fur ther object is to prevent t-he accumulation in the feeder of any semi-fluid substance.

The invention will be hereinafter fully set4 forth and claims.

- In the accompanying drawings, Figure 1 is a side elevation. Fig. 2 is a plan view. Fig. 3 is a face View of the controlling valve. Fig. 4 is a vertical section on line 4 4, Fig. 3. Fig. 5 is a. transverse section on line` 5 5,

particularly pointedout iny the Fig. 4.

Referring to the drawings, 1 designa-tes a valve which is preferably of the gate type, and provided with an upwardly extending stem 2 which is encircled by a spring 3 which in the present instance is designed-to normally hold the valve to its seat. On the valve casing is a yoke 4 through an opening in which the valve stem' is passed.

5 is a lever fulcrumed at one end in an upward projection of yoke 4 and is guided by a second projection 6 formed with a slot through which the lever is passed. The latter is adj'ustably connected to the upper end of the valve stem by a link 7 having a series of openings 8 through any one of which the pivot pin may be passed. By adjusting this connection the throw of the valve may be regulated. On its free end the lever carries a wedge '9 which is adjustably connected by a screw 10 passed through a longitudinal slot in the lever. Y

12 designates a wheel which is shown as of sprocket formation with a series of rollers 13 mounted in the several peripheral proj ections. Each of these rollers is designed to successively engage the wedge 9 and more thelvalve controlling lever in one direction to effect the movement of the valve in opposition to its retaining spring..J In the pres ent instance such movement veffects the un- A y seating of the valve, but if the spring were employed to normally hold the valve open the parts would be so arranged that the action of the roller-carrying wheel on the lever would effect the closing ofthe valve. According to the means shown, the valve will be held open as long .as a roller remains in engagement with the inclined surface of the wedge. The degree to which the valve is opened depends upon the position of the Wedge on the lever, or this may be controlled by adjusting the connection of link 7. The roller-carrying wheel is mounted on a shaftI 14 which is shown as journaled in two arms 15 projecting from a suitable support which may be in the form of a. ring 16 held in place by yoke 4. On this shaft is a sprocket wheel 17 which is designed to be engaged by a sprocket chain (not shown) leading from any suitable operating agency.

In practice, the valve casing isv connected at onev end to the supply tank or reservoir containing slurry, wood pulp or the like, and the other end is connected to the kiln or digester as the case may be. A uniform supply of the dense liquid or semi-liquid material is insured by the positive opening and ment of the roller-carrying wheel with thewedge of the lever.

This wedge may be readily adjusted to increase or decrease the travel of the valve, but the same result may be secured by changing the point of connection between the valve stem and the lever.

To prevent slurry or other semi-fluid substances from accumulating in the valve and interfering with its operation, I secure bearing plates 18 to the edges ofthe two faces of the valve disk and form a chamber 19 extending through the bottom of the disk, and an opening 20 through the side of the disk facing the discharge side of the Valve. The disk is tapered toward the bottom so as to force any solid matter to one side in closing the valve, and any material beneath the latter will be crowded into the chamber 19 and out through opening 20.

I have shown and described the preferred form of embodiment of my invention, but

changes may be made Without departing from the scope thereof. l

I claim as my invention 1 A feeder for slurry, Wood pulp .and other semi-fluid material, comprising, in combination, a valve, a spring for holding such valve in one position, a lever connected 2. A feeder. or slurry, Wood p ulp andA other semi-Hui' materials, comprising, in combination, a valve, a spring for holding such valve 1n one position, a lever connected lto such valve for moving it in opposition to such spring, a Wedge adjustably secured to such lever, and'an agency for periodically engaging such wedge to move such lever to actuate the valve in the opposite direction to the action of the. spring thereon.

3.- A feeder for slurry, Wood-pulp and other semi-fluid materials, comprising, in

.36 combination, a valve, a spring for holding such valve in one position, a lever connected to such valve for moving it in opposition to such spring, such lever having an inclined portion adjustable longitudinally thereof, and a constantlyl operating Wheel having spaced-apart. peripheral projections for pelriodically engaging such inclined portion to lmove such lever to actuate the valve in "the -opposite direction to the action of the spring thereon.

4. A feeder for slurry, Wood pulp and` other semifluid materials, comprising, in combination, a valve, a spring for holding such ,Valve in one4 position, a lever connected to su'ch valve vfor moving it in opposition to A yengaging such Wedge.

, such spring, a Wedge adjustably secured to such lever, and a constantly operating wheel having projection portions for periodically .5.' Incoinbination, a valve, a spring for holding such valve in one position, a lever connected to such valve for moving it in opposition to such springfa wedge adjustably secured to such lever, and a constantly f operating Wheel carrying a series of rollers for periodically engaging such Wedge.

6.4 In combination, a valve, a stein leading fromtsucli valve, a spring encircling such stein, a yoke mounted on the valve casing, a lever fulcrumed on said yoke, an adjustable connection betweensaidlever and said valve stem, .a Wedge adjustably secured on said lever,\a sprocket-like Wheel carrying a seriesl of rollers for engaging said Wedge, a shaft on which said Wheel is mounted, a support for such shaft, and means for operating the latter.

7. In a valve for slurry, wood pulp and the like, a casing having an inlet and an outlet inline with each other, a disk tapered toward the bottom on opposite sigles and having in its lower portion a chamber opening through its bottom and having an outlet through one of said tapered sides `at the lower end'thereof and in line with the outlet of the valve casing. f

8. Ina valve for slurry, Wood pulp and the like, a tapered disk having bearing plates secured to its-edges, said disk having a chamber opening through the bottom of the disk, and an `outlet opening from such chamber in one face of such disk.

In testimony whereof, I have signed this specification in the presence of tWo subscribing witnesses.

RALPH W. E. LEACI-I. Witnesses: Y

FRED KSMARSHALL, Josirrfi ,EBNEiL 

